Check out example codes for "how to insert multiple records at once in sql acess". It will help you in understanding the concepts better.

Code Example 1

INSERT INTO target_table ( column_name1, column_name2 )
SELECT column_name1, column_name2
FROM (SELECT tableNameColumn AS column_name1, tableNameColumn2 FROM tableName, tableName2
WHERE tableNameColumn = 3 AND tableNameColumn2 = 1 
UNION ALL
SELECT tableNameColumn AS column_name1, tableNameColumn2 FROM tableName, tableName2
WHERE tableNameColumn = 3 AND tableNameColumn2 = 1) AS TMP

example:
INSERT INTO ProgKnowledge ( UserID, ProgramID )
SELECT UserID, ProgramID
FROM (SELECT Users.ID AS UserID, Programs.ProgramID FROM Users, Programs
WHERE Programs.ProgramID = 3 AND Users.ID = 1
UNION ALL
SELECT Users.ID AS UserID, Programs.ProgramID FROM Users, Programs
WHERE Programs.ProgramID = 4 AND Users.ID = 1)  AS add;

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